Spreadsheet for calculating required soakaway size (outside UK more commonly known as: dry well). Pit/well of this type is to first store immediate stormwater run-off and then slowly dissipate it through infiltration into surrounding soil. In this way water is treated on site and not discharged into public system. Stormwater control has become a very important aspect in recent years. In UK it is regulated under building regulations and discharge from new developments into public sewer cannot be higher than before construction of, say, house or building.This software is very useful for both, large and small scale projects. It is recommended for civil engineers designing roads and hardstandings, structural engineers designing drainage for industrial and commercial developments, builders constructing domestic extensions or any land owner who wants to protect the environment by treating water on site.

Features:

- Can be easily used by a civil engineer, structural engineer, CAD technician as well as a builder or a regular house owner - no technical knowledge required;- A clear and easy to read output (all on a single page);- Three types of soakaways covered: trench/pit, perforated concrete ring in square pit, perforated concrete ring in circular pit;- Pop-up window for easier selection of rainfall ratios - gives figures for larger cities;- Calculates soil infiltration rate based on soakage trial pit test results;- Adjustable infiltration through base (allowed with modular tanks);- Adjustable allowance for climate change;- Automatically calculates Z2 growth factor based on given rainfall ratio, M5-60 rainfall depth and rainfall duration;- Covers ten rainfall duration periods: M1-D, M2-D, M3-D, M4-D, M5-D, M10-D, M20-D, M30-D, M50-D, M100-D;- Calculates alternate soakaway sizes for different trench widths and ring diameters;- Covers two site locations: England and Wales, Scotland and Northern Ireland;- Includes a 50% emptying time check;- Design is based on BRE Digest 365: 2007 edition (Note: BRE issued an updated edition in 2016, the spreadsheet is still based on 2007 edition)

(Note: macros must be enabled for proper working of the spreadsheet. Follow instructions in this video)

What People Say:

Title

/

Company

1

2

3

4

5

You can work out by hand, but this excellent table cuts the time down for those that know their inputs and realistic outputs.

Director

/

/

1

2

3

4

5

I downloaded the soakaway calculation spreadsheet, and to be honest was not expecting much. Considering other software is priced at £450!However - I am delighted, the software does all that I want, when the planners asked for a 1 in 30 year storm event instead of the normal 10 year I did panic a bit. But looking closely at the software it even gives you the ability to update this - 10 out of 10 !!!

Geoff Cawse

/

/

Michael C.

/

To run the Single-User Licensed version you require:- Microsoft Windows Excel version 2007 to 2016;(Note: the Single-User spreadsheet will not run on Mac due to unsupported activation procedure)

To run the Company Licensed version you require either:- Microsoft Windows Excel version 2007 to 2016;- Microsoft Mac Excel version 2001, 2004, 2011 to 2016. If unsure then see whether the FREE version works.

Download Section:

FREE Lite version: Soakaway Design Spreadsheet to BRE 365 (1.2).

The restriction in this free lite version is that you can not change the company name nor the logo (shown in top left corner) - currently set to a made up company.

Fully working version where you can change the company information and logo in the top left corner.

By purchasing this spreadsheet you agree to the disclaimer and terms & conditions. Two types of licenses are available for this spreadsheet. The single-user license is offered for a nominal price of £20 - a great product that you can have for a great value.